THOMAS de Coucy, son of ENGUERRAND [I] de Boves Seigneur de Coucy & his first wife Ada de Marle [Roucy] ([1070/75]-[1130/31]). The Annales Lobienses name "Letaldus de Marla…filiam nomine Adam" as mother of "Thomam de Marla"[93]. The Chronicle of Alberic de Trois-Fontaines names "filia…Letardi domni de Marla… Ada" as mother of "Thomam de Cocy"[94]. Guibert de Nogent names "Thomam, Ingelranni filium"[95]. "…Ingelrannus de Codiciaco…et Thomas filius eius…" witnessed the charter dated 1086 which confirmed property of the church of Reims[96]. William of Tyre records "…Thomas de Feria…" among those who joined the contingent led by Hugues Comte de Vermandois on the First Crusade in 1096[97]. Suger's Vita Ludovici records that "Thomam de Marna" was besieged by "pater eius Engerrannus de Bova" at "castrum…Mons Acutus…in pago Laudunensi"[98]. Seigneur de Coucy et de Marle, Comte d'Amiens. In 1117, Louis VI "le Gros" King of France confiscated the county of Amiens and granted it to Adelais Ctss de Vermandois[99]. Suger's Vita Ludovici also records that "Thomam de Marna" was eventually captured and died in captivity[100]. The Chronique de Guillaume de Nangis records in 1128 that "Louis roi des Français fit marcher une armée contre Thomas de Marle seigneur de Coucy", who was captured by "Raoul comte de Vermandois" and handed mortally wounded to the king[101].
m firstly ([1100], repudiated) IDA de Hainaut, daughter of BAUDOUIN II Comte de Hainaut & his wife Ida de Louvain ([1085]-after [1105]). The Genealogiæ Scriptoris Fusniacensis refers to "sororem Balduini comitis Hainoensis" as wife of "Thomam de Marla"[102]. The Chronicon Hanoniense refers to a second unnamed sister of "comitis Hainoniensis" who married "Thome de Marla"[103]. The Annales Lobienses refer to "sororem Balduini comitis Hainoensis" as wife of "Thomam de Marla"[104]. The primary source which confirms her name has not yet been identified.
m secondly ---. This second marriage is indicated by Suger's Vita Ludovici which records that "Thomam de Marna" acquired "castrum…Mons Acutus in pago Laudunensi, occasione cuiusdam matrimonii"[105]. Tardif suggests that she was "probablement la fille de Roger de Montaigu et d´Ermengarde", adding that the couple were separated soon afterwards on the grounds of consanguinity (no primary source cited which provides the basis for the statement)[106].
m thirdly MELISENDE de Crécy, daughter of GUY Seigneur de Crécy-sur-Serre & his wife --- (-after 1147). The Annales Lobienses name "de terra Ambianensi…Milesendem" as wife of "Thomam de Marla" after he repudiated his first wife[107]. The Chronicle of Alberic de Trois-Fontaines refers to the second wife of "Thomas de Coci" as "domna de Bovis"[108]. Tardif records Thomas´s third marriage with "Milesende de Crécy, héritière de Guy seigneur de Crécy-sur-Serre", adding that her dowry was "les deux châteaux de Crécy et de Nouvion-l´Abbesse, dépendant tous deux de l´abbaye de Saint-Jean de Laon" (no primary source cited which provides the basis for the statement)[109]. A charter dated 16 Apr 1131 records the restoration of "Erlons et manso sancti Lamberti" to Laon Saint-Vincent, subscribed by "Gerardi vicedomini, Nicholai castellani...domine Milesendis, Ingelranni filii euus..."[110].
Thomas & his first wife had two children